Nut-lock.



H.. N HNCHRTT T. A. HALL.

NU? JJK Hummm? www wml. 1911.

@33,58 EL, Patented July 23, 1912.

11; fm fl-lfd 5 {ukraine/q s rnnrnn STATES PATENT onirica HABY N. HANCHETT AND THOMAS A. HALL, F JACKSON, MICHIGAN.

NUT-LOCK.

Specicaton of Letters Yat-ent. Patented July 23, 1912.

Serial No. 641,710.

Application tiled August 1, 1911.

against turning on the bolt. At. suitable intervals around its outer edge the washer 4 has 'formed therein slits or cuts 6 said slits being arranged tangential to the center of the washer. The material thus eut from the washer is bent 'upwardly as shown to form a series of spring locking pawls 7 the outer ends of which are turned or bentl downwardly at an anglo to form a beveled surface, the purpose of which will be hereinafter described. By thus constructing the washer 4 it will be seen that whenl the same is applied to the boltI and the nutscrewed on the latter and into engagement with the washer that the corners of the nut as the latter is turned will engage the u wardly bent pawls 7 thus depressing tiie same to allow the nut to screw up into tight engagement with the washer in which position the nut will be held by the engagement ofthe pawls with the sides of the nut, said pawls springing up after being depressed by. the inwardly screwing movement of the nut. By bending the outer ends of the pawls inwardly at an angle a beveled surface is formed against which the nut may be turned when unscrewed by force with a wrench or other suitable tool thus depressing the pawls and permitting the nut to be removed from the bolt when desired.

As clearly shown the locking pawls 7 of the washer 4, are arranged in such a' manner that one of the same will lock the nut, while the remaining tongues yieldingly `bear against the inner surface of the same, whereby the said nut can be readily unscrewed from the bolt by an ordinary tool or wrench. In accomplishing the results referred to it is necessary that the tongues 7 should be bent'outwardly at an acute angle intermediate their length, with their free ends thereof in a plane with form a part.

From the foregoing description taken in connection with the accompanying rawings, the construction and operation of the invention will be readily understood without reouiring a more extended explanation.

Having thus described our invention, what we claim is:

As an article of manufacture, the herein To all whom it may concern.'

Be it known that we, HARRY N. HAN- eun'r'r and THOMAS A. HALL, citizens of the l United States, residing at Jackson, in the county of Jackson and State of Michigan, have invented certain new and useful lmprovements in Nut-Locks and we do declarev the following to be a full, clear, and exact description of the invention, such as will en able others skilled inthe art to which it appcrtains to make and use the same.

T his invention relates to improvements in nut locks.

, One object of the invention is to provide a nut lock having an improved construc' tion and arrangement of locking devices which are adapted to automatically engage the nut. when the latter has been screwed t( the desired position on the bolt.

Another object is to provide a nut lock of this character which will securely hold the I nut against casual unscrewing but which u ill permit the removal of the nut by means of a wrench or other suit-able tool.

A further and important object of the invention is in the provision of a washer constructed in such a manner that the nut to be secured is not only held in a locked position upon the bolt but is yieldingly engaged, as will appear from the detailed descri tion to follow.'

l lith these and other objects in view the invention consists of certain novel features o construction, and the-combination and arrangement of parts as will be more fully described and claimed.

'In the accompanying drawings: Figure l is a side view'of a bolt and nut showing the application of the invention thereto', Fig. 2 is an end view of the same; and Fig'. 3 1s a detail perspective view ot the locking washer.

Referring more particularly ings, l denotes a bolt in one side of which is termed a longitudinally disposed groove 2 which preferably extends throughout the length of the bolt. Adapted to be screwed onto the. bolt l is a nut 3 which may be of any desired construction. I

Our improved lock comprises a washer 4 which may be of any suitable shape and which is here shown as being of circular described not lock comprising a washer havln the opening or" the washer is l ing plurality of yielding nut engaging which is adapted to tit pawls formed by slitting the washer tan- 1 gentially to the Aopening therein, said pawls lbeing bent at an acute angle intermediate to the drawform. formed a tongue 5 into and slidably engage the groove 2 in the bolt thereby firmly holding the washer the opening inthe washer of which theyl their length the ends of which are in a In testimony whereof we have hereunte plane with the Washer, whereby any one of set our hands m presence Qf two subscribing 10 said pawls is adapted for engagement with Witnesses.

a nut for locking the same, with the remain- HARRY N. HANCHETT. ing ones in yielding Contact With the nut, THOMAS A. HALL.

and a tongue projecting from the opening of Witnesses:

the Washer for preventing the Same from JodN MCDEVITT,

turning upon a bolt. CLAUDE E. GROVE. 

